Twist Bioscience officer plans $57K stock sale

An officer of Twist Bioscience has filed a Rule 144 notice to sell 348 recently vested shares, partly to cover tax obligations, after several sales in the prior three months.

Rhea-AI Filing Summary

Twist Bioscience Corp (TWST) has a notice under Rule 144 for planned sales of common stock by officer Dennis H. Cho. The filing covers 348 shares held at Fidelity Brokerage Services LLC, valued at $57,591.01 as of September 21, 2026, acquired through restricted stock vesting on September 18, 2026 as compensation from the issuer. The remark states that the planned sale includes shares to cover a tax obligation from the settlement of a vested equity award distribution and lists multiple prior common stock sales by Cho during the preceding three months.

Key Figures

Planned shares to be sold: 348 shares Market value of planned sale block: $57,591.01 Shares acquired via restricted stock vesting: 348 shares +4 more

7 metrics

Planned shares to be sold 348 shares Common stock covered by the Rule 144 notice as of September 21, 2026

Market value of planned sale block $57,591.01 Value associated with 348 shares of common stock as of September 21, 2026

Shares acquired via restricted stock vesting 348 shares Restricted stock vesting on September 18, 2026, acquired from issuer as compensation

Sale on June 22, 2026 346 shares for $30,213.55 Common stock sale by Dennis H. Cho during prior three months

Sale on June 24, 2026 14,205 shares for $1,274,898.75 Common stock sale by Dennis H. Cho during prior three months

Sale on August 5, 2026 14,205 shares for $1,558,998.75 Common stock sale by Dennis H. Cho during prior three months

Sale on August 19, 2026 14,205 shares for $1,843,098.75 Common stock sale by Dennis H. Cho during prior three months

Key Terms

Rule 144, Restricted Stock Vesting, vested equity award distribution, attorney-in-fact

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 09/18/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

vested equity award distribution financial

"tax obligation resulting from the settlement of a vested equity award distribution"

attorney-in-fact regulatory

"as attorney-in-fact for Dennis H. Cho"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for Twist Bioscience Corp (TWST)?

It discloses that officer Dennis H. Cho has filed a Rule 144 notice for the potential sale of 348 shares of Twist Bioscience common stock, related to restricted stock that vested on September 18, 2026, with an indicated value of $57,591.01 as of September 21, 2026.

How many Twist Bioscience (TWST) shares has Dennis H. Cho sold in the past three months?

The notice lists several prior sales of Twist Bioscience common stock by Dennis H. Cho during the past three months, including transactions of 346, 14,205, 1,070, 14,205, 14,205, 1,598, and 412 shares on various dates from June 22, 2026 through September 8, 2026.

What is the stated purpose of part of the planned TWST share sale?

The remark explains that the planned sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution tied to restricted stock vesting on September 18, 2026.

How were the Twist Bioscience (TWST) shares to be sold acquired by Dennis H. Cho?

The 348 shares covered by the notice were acquired on September 18, 2026 through Restricted Stock Vesting from the issuer, with the method of acquisition described as Compensation.

Who is executing the planned Rule 144 sale for Twist Bioscience shares?

The securities are held at Fidelity Brokerage Services LLC, which signed the notice through /s/ Wade Moss as a duly authorized representative and attorney-in-fact for Dennis H. Cho on September 21, 2026.

On which market are the Twist Bioscience (TWST) shares in this Form 144 listed?

The common stock referenced in the notice is listed on the NASDAQ market, as stated in the securities information section of the filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/21/2026 - 04:54 PM Accepted by SEC EDGAR 09/21/2026 - 04:52 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001883451
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Twist Bioscience Corp
SEC File Number	001-38720
Address of Issuer	681 GATEWAY BLVD. SOUTH SAN FRANCISCO CALIFORNIA 94080
Phone	800-719-0671
Name of Person for Whose Account the Securities are To Be Sold	Cho Dennis
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	348	57591.01	62707424	09/21/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/18/2026	Restricted Stock Vesting	Issuer			348	09/18/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	06/22/2026	346	30213.55
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	06/24/2026	14205	1274898.75
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/03/2026	1070	91293.68
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/05/2026	14205	1558998.75
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/19/2026	14205	1843098.75
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	08/21/2026	1598	222228.11
Dennis H. Cho 681 Gateway Blvd South San Francisco CA 94080	Common	09/08/2026	412	50521.05

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	09/21/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Dennis H. Cho
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)